The navigation sheet at the top shows relative humidity (%) and dew point (°C or °F), which corresponds to the position of the finger on the screen.
The horizontal line shows the relative humidity for a specific height and for the whole day at once.
The main screen shows the relative humidity in color.
The color scale is listed at the bottom of the main screen.
You can adjust the vertical range classically with two fingers from 1.5 km to approx. 12 km.